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Temporal Pattern Recognition with Delayed-Feedback Spin-Torque Nano-Oscillators

M. Riou, J. Torrejon, B. Garitaine, F. Abreu Araujo, P. Bortolotti, V. Cros, S. Tsunegi, K. Yakushiji, A. Fukushima, H. Kubota, S. Yuasa, D. Querlioz, M.D. Stiles, and J. Grollier
Phys. Rev. Applied 12, 024049 – Published 23 August 2019

Abstract

The recent demonstration of neuromorphic computing with spin-torque nano-oscillators has opened a path to energy efficient data processing. The success of this demonstration hinged on the intrinsic short-term memory of the oscillators. We extend the memory of the spin-torque nano-oscillators through time-delayed feedback. We leverage this extrinsic memory to increase the efficiency of solving pattern recognition tasks that require memory to discriminate different inputs. The large tunability of these nonlinear oscillators allows us to control and optimize the delayed-feedback memory using different operating conditions of applied current and magnetic field.

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  • Received 7 May 2019
  • Revised 25 June 2019

DOI:https://doi.org/10.1103/PhysRevApplied.12.024049

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear DynamicsCondensed Matter, Materials & Applied PhysicsInterdisciplinary Physics

Authors & Affiliations

M. Riou1, J. Torrejon1, B. Garitaine1, F. Abreu Araujo1, P. Bortolotti1, V. Cros1, S. Tsunegi3, K. Yakushiji3, A. Fukushima3, H. Kubota3, S. Yuasa3, D. Querlioz4, M.D. Stiles2, and J. Grollier1,*

  • 1Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
  • 2Alternative Computing Group, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USA
  • 3National Institute of Advanced Industrial Science and Technology (AIST), Spintronic Research Center, Tsukuba, Ibaraki 305-8568, Japan
  • 4Center for Nanoscience and Nanotechnology, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, France

  • *julie.grollier@cnrs-thales.fr

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Vol. 12, Iss. 2 — August 2019

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